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From: Igor Gutorov <igootorov@gmail.com>
To: dsosnowski@nvidia.com, viacheslavo@nvidia.com, orika@nvidia.com,
	suanmingm@nvidia.com, matan@nvidia.com
Cc: dev@dpdk.org, Igor Gutorov <igootorov@gmail.com>
Subject: [PATCH 0/1] net/mlx5: show rx/tx descriptor ring limitations in rte_eth_dev_info
Date: Sun, 16 Jun 2024 20:38:02 +0300	[thread overview]
Message-ID: <20240616173803.424025-1-igootorov@gmail.com> (raw)

Hello,

This patch fixes an issue with my ConnectX5 NIC (15b3:1019) showing
65535 as the maximum number of RX descriptors.

So, a disclaimer: I don't know whether other NICs (ConnectX6?) allow
larger values. The value of 8192 was obtained experimentally with
ethtool: ethtool -G *nic* rx 8192, as I do not have the NIC
programmer's manual.

Using anything larger than 8192 resulted in an error. Similarly,
anything in the [8193, 32768) range with the DPDK PMD results in an rx
queue allocation failure.

Igor Gutorov (1):
  net/mlx5: show rx/tx descriptor ring limitations in rte_eth_dev_info

 drivers/net/mlx5/mlx5_defs.h   | 3 +++
 drivers/net/mlx5/mlx5_ethdev.c | 5 ++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

--
2.45.2


             reply	other threads:[~2024-06-16 17:39 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-06-16 17:38 Igor Gutorov [this message]
2024-06-16 17:38 ` [PATCH 1/1] net/mlx5: show rx/tx descriptor ring limitations in rte_eth_dev_info Igor Gutorov
2024-06-17  7:18   ` Slava Ovsiienko
2024-06-18 22:56     ` [PATCH v2 0/1] net/mlx5: fix incorrect rx/tx descriptor " Igor Gutorov
2024-06-18 22:56       ` [PATCH v2] " Igor Gutorov
2024-10-07 20:37         ` Stephen Hemminger
2024-06-23 11:34       ` [PATCH v2 0/1] " Slava Ovsiienko
2024-08-07 20:44         ` [PATCH v3 0/2] net/mlx5: fix reported Rx/Tx desc limits Igor Gutorov
2024-08-07 20:44           ` [PATCH v3 1/2] " Igor Gutorov
2024-10-28 15:47             ` Slava Ovsiienko
2024-08-07 20:44           ` [PATCH v3 2/2] common/mlx5: reduce HCA attribute type sizes Igor Gutorov
2024-10-28 15:48             ` Slava Ovsiienko
2024-08-07 20:58           ` [PATCH v3 0/2] net/mlx5: fix reported Rx/Tx desc limits Igor Gutorov
2024-09-19 19:42             ` Igor Gutorov
2024-10-30 14:19           ` Raslan Darawsheh
2024-10-10  0:18     ` [PATCH 1/1] net/mlx5: show rx/tx descriptor ring limitations in rte_eth_dev_info Stephen Hemminger
2024-10-10  9:06       ` Igor Gutorov

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